Bug#518865: can't set "go to tab" either

[Adam Borowski]

It appears that the entire keyboard shortcuts system was changed, and it
seems to me that not for better.  Most shortcuts are either moved or
deleted.

I personally miss "go to tab 1/..." the most, the current default makes it
impossible to use many programs like irssi which use Alt-1/... -- at least
without using a single tab or reverting to some other terminal emulator.